Telescopic tube with adjustment memory function

ABSTRACT

A telescopic tube is disclosed. By pressing and rotating a switching button, an abutting section is aligned to a first hole of an outer tube and then elastically pushed by an elastic member, a pin section of the switching button is released from engagement with a fastening hole of the inner tube, and the position of the inner tube in the outer tube can be adjusted individually. After the inner tube is adjusted completely and the switching button is pressed to rotated again, the pin section is inserted into the fastening hole, the engaging section is engaged in the first hole. When the switching button is pressed, the movement of the inner tube makes the switching button release from the first hole and the third hole, and the inner tube, the control assembly and the inner mounting member are retractable in the through hole of the outer tube.

CROSS-REFERENCE TO RELATED PATENT APPLICATION

This application is a divisional application of U.S. application Ser.No. 16/886,707, filed on May 28, 2020, and which is incorporated byreference herein in its entirety.

Some references, which may include patents, patent applications andvarious publications, may be cited and discussed in the description ofthis disclosure. The citation and/or discussion of such references isprovided merely to clarify the description of the present disclosure andis not an admission that any such reference is “prior art” to thedisclosure described herein. All references cited and discussed in thisspecification are incorporated herein by reference in their entiretiesand to the same extent as if each reference was individuallyincorporated by reference

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a telescopic tube with an adjustmentmemory function, and more particularly to a telescopic tube can providea user to set and adjust the telescopic tube to a required length and innext use adjust the telescopic tube to the required length by a one-timeoperation without setting again in various application fields oftelescopic tube, so as to achieve effect of convenience andlabor-saving.

2. Description of the Related Art

There are many documents disclosing configuration of the telescopicstructure, for example, ROC Patent No. M570040, titled “MultifunctionalCrutch”, ROC Patent No. M567318, titled “Telescopic Fastening Device”,ROC patent No. M561461, titled “Adjustable Office Exercise Chair”, ROCPatent No. M486418 “Automatic Telescopic Crutch”. These patents disclosethe device with retracting function to adjust the length thereof.However, the devices disclosed in these documents have a commondisadvantage that after the user adjusts the length of the device, innext use the user must adjust the length again, and the user may notpossibly adjust the device to the most suitable position in eachadjusting operation, and it consumes time and causes great inconvenienceto the user; furthermore, the holes for adjusting the length of thedevice are generally disposed on the outermost tube, and dust andforeign objects may easily get stuck and accumulated in the hole, and itwill affect future adjustments.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide a telescopic tubewhich can be directly adjusted to an appropriate length by an extendingoperation in every use without setting again, so as to solve theconventional problem. In order to achieve the objective, the telescopictube with adjustment memory function of the present invention can beimplemented by three embodiments mainly. In the first embodiment, atelescopic tube with an adjustment memory function includes an outertube having a through hole passing through two opposite ends thereof,and a first hole formed on an end surface thereof and in communicationwith the through hole, wherein the first hole is in a polygonal shape;an inner tube inserted into in the through hole and having a pluralityof fastening holes formed on a side surface thereof, wherein the innertube is in a hollow shape, the plurality of fastening holes are arrangedin interval and one of the plurality of fastening holes is configured tocorrespond in position to the first hole, and the inner tube isretractable and movable relative to the outer tube; an inner mountingmember mounted on an outer periphery of the inner tube and movableinside the through hole, wherein the inner mounting member has a secondhole disposed correspondingly in position to the first hole, and thesecond hole is in a polygonal shape; a control assembly mounted betweenthe through hole and an outer wall of the inner tube, and comprising aswitching button and an elastic member, wherein the switching buttoncomprises an engaging section, an abutting section and a pin section,the engaging section is connected to a top surface of the abuttingsection, and the pin section is connected to a bottom surface of theabutting section, and the elastic member is mounted on the pin section,and an end of the elastic member is elastically abutted with theabutting section, other end of the elastic member is elastically abuttedwith an outer surface of the inner tube, the abutting section ispivotable inside the second hole, and a shape of the abutting section isthe same to a shape of the first hole; an outer mounting member mountedon an end of the outer tube, wherein the inner tube passes through theouter mounting member, and the outer mounting member has a third holedisposed correspondingly in position to the first hole, the third holeis in communication with the first hole and in a round shape; whereinwhen the switching button is pressed and rotate to make the abuttingsection align to the first hole, the abutting section is elasticallypushed by the elastic member and the pin section is released fromengagement with the fastening hole to form a releasing state, so that aposition of the inner tube is adjustable individually; wherein after theinner tube is adjusted completely, the switching button is pressed torotated again, the pin section is inserted into one of the fasteningholes and the abutting section is abutted with the inner wall of theouter tube, and the engaging section is engaged with the first hole toform a restraining status, and when the switching button is directlypressed in the restraining status, telescopic movement of the inner tubemakes the switching button release from engagement with the first holeand the third hole because of, and the inner tube, the control assemblyand the inner mounting member become retractable and movable inside thethrough hole.

In the second embodiment, a telescopic tube with an adjustment memoryfunction includes an outer tube having a through hole passing throughtwo opposite ends thereof, and a first hole formed on an end surfacethereof and in communication with the through hole, wherein the firsthole is in a round hole; an inner tube inserted into in the throughhole, and a plurality of fastening holes formed on a side surfacethereof, wherein the inner tube is in a hollow shape, the plurality offastening holes are arranged in interval and corresponding in positionto the first hole, and the inner tube is retractable and movablerelative to the outer tube; an inner mounting member mounted on an outerperiphery of the inner tube and movable along with the inner tube insidethe through hole of the outer tube, wherein the inner mounting memberhas a second hole formed on a side thereof corresponding in position tothe first hole of the outer tube, and the second hole is in a longelliptic hole; a control assembly mounted between the through hole andan outer wall surface of the inner tube, and comprising a switchingbutton and an elastic member, wherein the switching button comprises anengaging section, an abutting section and a pin section, the engagingsection is connected to a top surface of the abutting section, and thepin section is connected to a bottom surface of the abutting section,and the elastic member is mounted on the pin section, and an end of theelastic member is elastically abutted with the abutting section, otherend of the elastic member is elastically abutted with the outer surfaceof the inner tube, and a shape of the abutting section is the same as ashape of the second hole; an outer mounting member mounted on an end ofthe outer tube, wherein the inner tube passes through the outer mountingmember, the outer mounting member has a third hole disposedcorrespondingly in position to and in communication with the first hole,and the third hole is in a round shape; wherein when the switchingbutton is pressed to rotate to make the abutting section align to thethrough hole, the abutting section is elastically pushed by the elasticmember, the pin section is released from engagement with the fasteninghole to form a releasing state, so as to adjust a position of the innertube individually; wherein after the inner tube is adjusted completelyand the switching button is pressed to rotated again, the pin section isinserted into the fastening hole and the abutting section is abuttedwith an inner wall of the outer mounting member to form a restrainingstatus, when the switching button is directly pressed in the restrainingstatus, telescopic movement of the inner tube make the switching buttonrelease from engagement with the first hole and the third hole, theinner tube, so that the control assembly and the inner mounting memberare movable and retractable in the through hole of the outer tube.

In the third embodiment, a telescopic tube with an adjustment memoryfunction includes an outer tube having a through hole passing throughtwo opposite ends thereof and having a small diameter hole and a largediameter hole formed on an end surface thereof and in communication withthe through hole, and a stop member disposed thereon and correspondinglyin position to the large diameter hole of the outer tube, wherein thestop member as a limit hole formed correspondingly in position to and incommunication with the large diameter hole and the limit hole has asmall hole section and a large hole section, the large hole section isstacked on the large diameter hole, and the small hole section isdisposed on a surface of the stop member; an inner tube inserted in thethrough hole and telescopically movable and rotatable relative to theouter tube, wherein the inner tube has a plurality of fastening holesformed on an outer wall surface thereof; an inner mounting membermounted in the through hole and on the outer wall of the inner tube, andhaving a second hole, wherein a hole diameter of the second hole islarger than that of the small diameter hole and smaller than that of thelarge diameter hole; a control assembly mounted in the through holedisposed between the outer walls of the outer tube and the inner tube,and comprising a switching button and an elastic member, wherein theswitching button comprises an engaging section, an abutting section anda pin section, the engaging section is connected to a top surface of theabutting section, and the pin section is connected to a bottom surfaceof the abutting section, the elastic member is mounted on the pinsection, and an end of the elastic member is elastically abutted withthe abutting section, other end of the elastic member is elasticallyabutted with the outer surface of the inner tube; wherein in a conditionthat the switching button is pressed and the inner tube is controlled toretract and rotate relative to the outer tube, when the switching buttonis moved to correspond in position to the small diameter hole, theengaging section is exposed out of the small diameter hole and theabutting section is abutted with the hole wall of the through hole, thepin section is inserted into any one of the plurality of fastening holesof the inner tube to form a restraining status; wherein when theswitching button is pressed in the restraining status, the innermounting member is adjusted and driven to retract and move in thethrough hole; wherein when the switching button is pressed and the innertube is rotated at the same time, the switching button is moved tocorrespond in position to the large diameter hole, the pin section isreleased from engagement with the fastening hole, and the engagingsection is inserted out of the small hole section of the stop member,the abutting section is attached to the stop member and located on thelarge hole section, so as to individually adjust the retracting positionof the outer tube relative to the inner tube.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure, operating principle and effects of the present inventionwill be described in detail by way of various embodiments which areillustrated in the accompanying drawings.

FIG. 1 is a perspective view of a first embodiment of a telescopic tubewith an adjustment memory function, according to the present invention.

FIG. 2 is a perspective exploded view of the first embodiment ofaccording to the present invention.

FIG. 3 is a schematic cross-sectional view taken along III-III of FIG. 1.

FIG. 4 is a schematic view of operation of adjusting a telescopic tubeto set a position of an inner tube, according to the first embodiment ofthe present invention.

FIG. 5 is a schematic view of operation of adjusting a telescopic tubeto set a position of an inner tube according to the first embodiment ofthe present invention, when viewed from another angle.

FIG. 6 is a schematic view of a pressing operation in a normal operationmode after the operation of adjusting and setting the position of theinner tube is completed, according to the first embodiment of thepresent invention.

FIG. 7 is a schematic view of an operation of pressing the switchingbutton and pushing the inner tube to retract inwardly, according to thefirst embodiment of the present invention.

FIG. 7A is a schematic cross-sectional view of an operation of extendingthe inner tube outwardly to the longest length to make an inner bottomsleeve abut with the inner mounting member in the outer mounting member,according to the first embodiment of the present invention.

FIG. 8 is a perspective view of a second embodiment of a telescopic tubewith adjustment memory function, according to the present invention.

FIG. 9 is a perspective exploded view of the second embodiment of thepresent invention.

FIG. 10 is a schematic cross-sectional view taken along V-V of FIG. 8 .

FIG. 11 is a schematic view of an operation of adjusting and setting aposition of an inner tube, according to the second embodiment of thepresent invention.

FIG. 12 is a schematic cross-sectional view of an operation of setting aposition of an inner tube according to the second embodiment of thepresent invention, when viewed from another angle.

FIG. 13 is a schematic view of an operation of moving a switching buttonback to operational position after the position of the inner tube isadjusted and set completely, according to the second embodiment of thepresent invention.

FIG. 14 is a schematic view of an operation of pressing the switchingbutton and pushing the inner tube to retract inwardly, according to thesecond embodiment of the present invention.

FIG. 14A is a schematic cross-sectional view of an operation ofextending the inner tube outwardly to the longest length to make aninner bottom sleeve abut with the inner mounting member in the outermounting member, according to the second embodiment of the presentinvention.

FIG. 15 is a perspective view of a third embodiment of a telescopic tubewith adjustment memory function, according to the present invention.

FIG. 16 is a perspective exploded view of the third embodiment of thepresent invention.

FIG. 17 is a schematic cross-sectional view taken along XVII-XVII ofFIG. 15 .

FIG. 18 is a schematic view of operation of adjusting a telescopic tubeto set a position of an inner tube, according to the third embodiment ofthe present invention.

FIG. 19 is a schematic view of operation of adjusting a telescopic tubeto set a position of an inner tube according to the third embodiment ofthe present invention, when viewed from another angle.

FIG. 20 is a schematic view of moving a switching button back tooperational position after the operation of adjusting and setting theposition of the inner tube is completed, according to the thirdembodiment of the present invention.

FIG. 21 is a schematic view of an operation of pressing the switchingbutton and pushing the inner tube to retract inwardly, according to thethird embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following embodiments of the present invention are herein describedin detail with reference to the accompanying drawings. These drawingsshow specific examples of the embodiments of the present invention.These embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the invention to thoseskilled in the art. It is to be acknowledged that these embodiments areexemplary implementations and are not to be construed as limiting thescope of the present invention in any way. Further modifications to thedisclosed embodiments, as well as other embodiments, are also includedwithin the scope of the appended claims. These embodiments are providedso that this disclosure is thorough and complete, and fully conveys theinventive concept to those skilled in the art. Regarding the drawings,the relative proportions and ratios of elements in the drawings may beexaggerated or diminished in size for the sake of clarity andconvenience. Such arbitrary proportions are only illustrative and notlimiting in any way. The same reference numbers are used in the drawingsand description to refer to the same or like parts.

It is to be acknowledged that, although the terms ‘first’, ‘second’,‘third’, and so on, may be used herein to describe various elements,these elements should not be limited by these terms. These terms areused only for the purpose of distinguishing one component from anothercomponent. Thus, a first element discussed herein could be termed asecond element without altering the description of the presentdisclosure. As used herein, the term “or” includes any and allcombinations of one or more of the associated listed items.

It will be acknowledged that when an element or layer is referred to asbeing “on,” “connected to” or “coupled to” another element or layer, itcan be directly on, connected or coupled to the other element or layer,or intervening elements or layers may be present. In contrast, when anelement is referred to as being “directly on,” “directly connected to”or “directly coupled to” another element or layer, there are nointervening elements or layers present.

In addition, unless explicitly described to the contrary, the word“comprise” and variations such as “comprises” or “comprising”, will beacknowledged to imply the inclusion of stated elements but not theexclusion of any other elements.

The present invention provides three embodiments. Please refer to FIGS.1 to 7 , which show the first embodiment. As shown in FIGS. 1 to 7 , thetelescopic tube includes an outer tube 1, an inner tube 2, an innermounting member 3 and a control assembly 4. The outer tube 1 is in ahollow shape, and has a through hole 11 passing through two oppositeends thereof, and a first hole 12 formed on an end surface and incommunication with the through hole 11. The first hole 12 is in apolygonal shape, for example, in the first embodiment of the presentinvention, a long elliptic shape is taken as an example of the holeshape of the first hole 12 for illustration; however, the first hole 12can also be other shape. The inner tube 2 is inserted and assembled inthe through hole 11 of the outer tube 1, and the inner tube 2 is in ahollow shape, and has a plurality of fastening holes 21 formed in a sidesurface thereof. The plurality of fastening holes 21 are arranged ininterval and corresponding to a side, in which the first hole 12 isdisposed, of the outer tube 1. The inner tube 2 is retractable andmovable relative to the outer tube 1. The inner mounting member 3 is ina tubular shape and mounted on an outer periphery of the inner tube 2and can be moved in the through hole 11 of the outer tube 1 along withthe inner tube 2. The inner mounting member 3 has a second hole 31formed on a side thereof corresponding in position to the first hole 12of the outer tube 1, and the second hole 31 can be in a polygonal shape,for example, a round hole is taken as an example for illustration in thefirst embodiment; however, the second hole 31 can be in other shape. Thecontrol assembly 4 is mounted between the through hole 11 of the outertube 1 and an outer wall surface of the inner tube 2, the controlassembly 4 includes a switching button 41 and an elastic member 42, theswitching button 41 includes an engaging section 411, an abuttingsection 412 and a pin section 413, the engaging section 411 is connectedto a top surface of the abutting section 412, and the pin section 413 isconnected to a bottom surface of the abutting section 412; furthermore,the elastic member 42 is mounted on the pin section 413, and an end ofthe elastic member 42 is elastically abutted with the abutting section412, and other end of the elastic member 42 is elastically abutted withthe outer surface of the inner tube 2, the abutting section 412 of theswitching button 41 is pivotable in the second hole 31, and a shape ofthe abutting section 412 is the same as the shape of the first hole 12of the outer tube 1. The outer mounting member 5 is mounted on an end ofthe outer tube 1, and the inner tube 2 passes through the outer mountingmember 5, and the outer mounting member 5 has a third hole 51 formedcorrespondingly in position to the first hole 12 of the outer tube 1 andin communication with the first hole 12, and in a round shape, that is,a shape of the third hole 51 matches with that of the engaging section411 of the switching button 41. By the operation of pressing androtating the switching button 41, the abutting section 412 can bealigned to the first hole 12 of the outer tube 1 and then elasticallypushed by the elastic member 42, so that the pin section 413 of theswitching button 41 can be released from insertion engagement with thefastening hole 21 of the inner tube 2 to form a releasing state, and aposition of the inner tube 2 in the outer tube 1 can be adjustedindividually; at this time, the abutting section 412 of the switchingbutton 41 can be abutted with the inner wall of the outer mountingmember 5 to be stopped from being ejected fully. After the inner tube 2is adjusted completely, the switching button 41 can be pressed torotated again, the pin section 413 is inserted into one of the fasteningholes 21 of the inner tube 2, the abutting section 412 of the switchingbutton 41 is abutted with the inner wall of the outer tube 1, and theengaging section 411 is engaged in the first hole 12, so as to form arestraining status. In the restraining status, the switching button 41can be directly pressed, telescopic movement of the inner tube 2 canmake the switching button 41 release from the engagement with the firsthole 12, so that the inner tube 2, the control assembly 4 and the innermounting member 3 are movable and retractable in the through hole 11 ofthe outer tube 1.

According to aforementioned contents, other technical features andoperation thereof are described in following paragraphs. In order todispose the elastic member 42 stably to prevent from affecting thepressing operation of the switching button 41, the abutting section 412has an annular fastening groove 414 annularly recessed on an end thereofconnected to the pin section 413, the end of the elastic member 42 isengaged in the annular fastening groove 414. With this configuration,the elastic member 42 can be mount stably and prevented from beingseparated or warped when the switching button 41 is pressed, so that theswitching button 41 can be firmly pressed by the user. Please refer toFIGS. 3, 5 to 7 . In order to make the inner tube 2 firmly stay in thethrough hole 11 of the outer tube 1 and prevent the inner tube 2 frombeing separated from the outer tube during the operation of retractingand adjusting the inner tube 2, the telescopic tube of the presentinvention can include an inner bottom sleeve 6 and two screws 7, theinner bottom sleeve 6 is mounted on opposite end, which is out of theouter mounting member 5, of the inner tube 2, and the inner bottomsleeve 6 is slidable in the through hole 11 of the outer tube 1. One ofthe two screws 7 is inserted into the inner bottom sleeve 6 and lockedwith the inner tube 2, and the other of the two screws 7 is insertedinto the outer mounting member 5 and engaged with the outer tube 1. Theouter mounting member 5 includes an inner insertion part 52 and an outercover part 53, a connection groove 54 is annually formed between theinner insertion part 52 and the outer cover part 53, the outer tube 1 isinserted in the connection groove 54, and the inner insertion part 52 isinserted in the through hole 11 of the outer tube 1, the outer coverpart 53 is abutted with the outer surface of the outer tube 1, the screw7 is inserted through the outer cover part 53, the outer tube 1 and theinner insertion part 52, to fasten the outer mounting member 5. Withthis configuration of the inner bottom sleeve 6 and the outer mountingmember 5, during the operation of retracting and adjusting the innertube 2, the inner bottom sleeve 6 can be used to limit extension of theinner tube 2 when the inner tube is extended to the longest length; inother words, after the inner bottom sleeve 6 is abutted with the innermounting member 3, the inner bottom sleeve 6 is continuously moved untilthe inner bottom sleeve 6 is limited by the inner insertion part 52 ofthe outer mounting member 5, and at this time the inner tube 2 isextended to the longest length, as shown in FIGS. 7A and 2 .

According to aforementioned contents, the steps of the operation ofadjusting length and memorizing position and using operation of thefirst embodiment are described in following paragraphs. In order toadjust the length and position of the inner tube 2, a user can press androtate the switching button 41 to make the abutting section 412 of theswitching button 41 align to the first hole 12, so that the switchingbutton 41 is elastically pushed by the elastic member 42 to release thepin section 413 from insertion and engagement with the fastening hole21, and the abutting section 412 is limited by the third hole 51 toprevent from ejecting out of the third hole 51; at this time, the innertube 2 can be pulled individually in the through hole 11 of the outertube 1 to move for position adjustment. After the user determines thelength and the position of the inner tube 2, the user can press androtate the switching button 41 to make the switching button 41 back tothe status in which the pin section 413 is inserted into any one of thefastening hole 21, so that the abutting section 412 can be limited inthe second hole 31. When user does not need to use the inner tube 2 anddesires to shorten the inner tube 2, the user just needs to press theswitching button 41 without rotation, the inner tube 2 can be movedafter the engaging section 411 is separated from the first hole 12, sothat the inner tube 2 can be retracted and moved inwardly toward thethrough hole 11 of the outer tube; in next use, the user just needs topull the inner tube 2 until the switching button 41 corresponds inposition to the first hole 12 of the outer tube 1 and the third hole 51of the outer mounting member 5 and is elastically pushed by the elasticmember 42 to eject, so that the engaging section 411 can be engaged inthe first hole 12 of the outer tube 1 and the third hole 51 of the outermounting member 5; as a result, the inner tube 2 can reach the memorizedlocation which is set previously, as shown in FIGS. 4 to 7 .

According to aforementioned basic structure features, the secondembodiment has other structure features different from that of the firstembodiment. Please refer to FIGS. 8 to 14 . The switching button 41 canbe pressed and rotated to make the abutting section 412 align to thesecond hole 31, and the pin section 413 can be elastically pushed by theelastic member 42 to release from insertion and engagement with any onehole of the inner tube 2, so that the inner tube 2 can reach theretracting adjustment position; at this time, the abutting section 412can be abutted with the inner wall of the outer tube 1, to prevent fromejecting fully; after the operation of setting the position of the innertube 2 is completed, the user can press and rotate the switching button41 again to make the abutting section 412 move back to and be limited bythe inner wall of the inner mounting member 3, and the pin section 413is inserted into any one of the fastening hole 21 naturally. Next, theuser can press the switching button 41 again without rotation, andretract the inner tube 2 inwardly into the through hole 11 of the outertube 1 at the same time, so as to receive the inner tube 2 in the outertube 1. In next use, the user can directly pull the inner tube 2 to makethe engaging section 411 correspond in position to the first hole 12 andthe third hole 51 of the outer mounting member 5, to adjust thetelescopic tube to the set position by one-time operation, In the secondembodiment of the present invention, in order to make the operation ofthe engaging section 411 of the switching button 41 more smoothlywithout being affected by the second hole 31 being a long elliptic hole,the second hole 31 of the inner mounting member 3 can have dodge grooves311 curvedly recessed on both longer sides, respectively, to make theengaging section 411 in a cylinder shape be firmly inserted through thesecond hole 31 and rotated in the second hole 31.

The difference between the third embodiment and the previous twoembodiments is that the inner tubes 2 and the outer tubes 1 of the firstand second embodiments are non-round tubes and the setting operationsare performed by pressing and rotating the switching buttons 41, but theinner tube 2 and the outer tube 1 of the third embodiment mainly areround tubes, and the setting operation is performed by pressing theswitching button 41 first and then rotating the inner tube 2 relative tothe outer tube 1. Please refer to FIGS. 15 to 21 . The outer tube 1 alsohas the through hole 11 formed thereon, but the outer tube 1 further hasa large diameter hole 13 and a small diameter hole 14 formed on an outersurface of an end thereof and in communication with the through hole 11.A stop member 8 can be assembled with the outer tube 1 and disposedcorrespondingly in position to the large diameter hole 13. The stopmember 8 as a limit hole 81 formed correspondingly in position to and incommunication with the large diameter hole 13. The limit hole 81 can bedivided into a small hole section 811 and a large hole section 812, thelarge hole section 812 is stacked on the large diameter hole 13, and thesmall hole section 811 is disposed on a surface of the stop member 8. Ahole diameter of the second hole 31 is larger than that of the smalldiameter hole 14 of the outer tube 1, and smaller than that of the largediameter hole 13. During the operation of the third embodiment, in orderto set the position of the inner tube 2, the user can press theswitching button 41 and then rotate the inner tube 2, to drive theswitching button 41 to move to the position corresponding to the largediameter hole 13; at this time the elastic member 42 can elasticallypush the switching button 41 to move toward the limit hole 81, torelease the pin section 413 from insertion and engagement with the anyone of fastening hole 21, so that the inner tube 2 can be pulledindividually to adjust the position thereof. After determining theposition of the inner tube 2, the user can press the switching button 41again to make the pin section 413 insert into the correspondingfastening hole 21, and then rotate the inner tube 2 to drive theswitching button 41 to move to the position corresponding to the smalldiameter hole 14; at this time, the switching button 41 is alsoelastically pushed by the elastic member 42 to make the engaging section411 insert into the small diameter hole 14 of the outer tube 1, theabutting section 412 is limited by the small diameter hole 14 to beabutted with the inner wall of the through hole 11, so that theoperation of adjusting and setting the position of the inner tube 2 canbe completed. Next, in order to receive the inner tube 2, the user justneeds to press the switching button 41 and push the inner tube 2 toretract inwardly into the through hole 11, so as to complete thereceiving operation. In next use, the user just needs to pull the innertube 2 to extend outwardly until the switching button 41 reaches theposition corresponding to the small diameter hole 14 and is elasticallypushed by the elastic member 42 to make the engaging section 411 insertthe small diameter hole 14. As a result, the telescopic tube of thepresent invention can allow the user to extend the inner tube 2 to thedesired position quickly without setting the inner tube 2 again.

In order to prevent the inner tube 2 from being excessively pulled toescape from the outer tube 1 during the extending operation, an innerbottom sleeve 6 can be mounted on the opposite end, which may be exposedout of the outer mounting member 5, of the inner tube 2. The innerbottom sleeve 6 is disposed inside the through hole 11 and can be movedalong with the telescopic movement of the inner tube 2. In the first andsecond embodiments, one of the two screws 7 can be inserted into andassembled with the inner bottom sleeve 6 to lock with the inner tube 2,the other of the two screws 7 can be inserted into the outer mountingmember 5 to lock with the outer tube 1, so as to block foreign matterfrom entering the tube. When being pulled by the inner tube 2, the innerbottom sleeve 6 can be abutted with the inner mounting member 3, so asto prevent the inner tube 2 from separating from the outer tube 1, asshown in FIG. 7A; in the third embodiment, only one screw 7 is required,and the screw 7 is inserted into the inner bottom sleeve 6 to lock withthe inner tube 2, and the stop member 8 can include a fastening pin 82disposed thereon and correspondingly in position to the engaging hole 15of the outer tube 1, the fastening pin 82 is inserted into the engaginghole 15, so as to fasten and assemble the stop member 8 with the outertube. Therefore, when the inner tube 2 is extended to move to make thescrew 7 abut with the inner mounting member 3, the inner tube 2 isextended to the longest length, which is not shown in figures.

The present invention disclosed herein has been described by means ofspecific embodiments. However, numerous modifications, variations andenhancements can be made thereto by those skilled in the art withoutdeparting from the spirit and scope of the disclosure set forth in theclaims.

What is claimed is:
 1. A telescopic tube with an adjustment memoryfunction, comprising: an outer tube having a through hole passingthrough two opposite ends thereof and having a small diameter hole and alarge diameter hole formed on an end surface thereof and incommunication with the through hole, and a stop member disposed thereonand correspondingly in position to the large diameter hole of the outertube, wherein the stop member as a limit hole formed correspondingly inposition to and in communication with the large diameter hole and thelimit hole has a small hole section and a large hole section, the largehole section is stacked on the large diameter hole, and the small holesection is disposed on a surface of the stop member; an inner tubeinserted in the through hole and telescopically movable and rotatablerelative to the outer tube, wherein the inner tube has a plurality offastening holes formed on an outer wall surface thereof; an innermounting member mounted in the through hole and on the outer wall of theinner tube, and having a second hole, wherein a hole diameter of thesecond hole is larger than that of the small diameter hole and smallerthan that of the large diameter hole; a control assembly mounted in thethrough hole disposed between the outer walls of the outer tube and theinner tube, and comprising a switching button and an elastic member,wherein the switching button comprises an engaging section, an abuttingsection and a pin section, the engaging section is connected to a topsurface of the abutting section, and the pin section is connected to abottom surface of the abutting section, the elastic member is mounted onthe pin section, and an end of the elastic member is elastically abuttedwith the abutting section, other end of the elastic member iselastically abutted with the outer surface of the inner tube; wherein ina condition that the switching button is pressed and the inner tube iscontrolled to retract and rotate relative to the outer tube, when theswitching button is moved to correspond in position to the smalldiameter hole, the engaging section is exposed out of the small diameterhole and the abutting section is abutted with the hole wall of thethrough hole, the pin section is inserted into any one of the pluralityof fastening holes of the inner tube to form a restraining status;wherein when the switching button is pressed in the restraining status,the inner mounting member is adjusted and driven to retract and move inthe through hole; wherein when the switching button is pressed and theinner tube is rotated at the same time, the switching button is moved tocorrespond in position to the large diameter hole, the pin section isreleased from engagement with the fastening hole, and the engagingsection is inserted out of the small hole section of the stop member,the abutting section is attached to the stop member and located on thelarge hole section, so as to individually adjust the retracting positionof the outer tube relative to the inner tube.
 2. The telescopic tubewith adjustment memory function according to claim 1, further comprisingan outer mounting member mounted on an end of the outer tube, whereinthe inner tube passes through the outer mounting member, and the outermounting member is configured to block the through hole.
 3. Thetelescopic tube according to claim 2, wherein the abutting section hasan annular fastening groove annularly recessed on an end thereofconnected to the pin section, and the end of the elastic member isengaged in the annular fastening groove.
 4. The telescopic tubeaccording to claim 3, further comprising an inner bottom sleeve and ascrew, wherein the inner bottom sleeve is mounted on opposite end, whichis exposed out of the outer mounting member, of the inner tube, whereinthe inner bottom sleeve is slidable in the through hole of the outertube, the screw is inserted into the inner bottom sleeve and locked withthe inner tube, and the stop member comprises a fastening pin disposedthereon and correspondingly in position to the engaging hole of theouter tube, and the fastening pin is inserted into the engaging hole tofasten and assemble the stop member with the outer tube.